body {
  display: flex;
  flex-direction: column;
  align-items: center;
}



.header {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  /* height: 226px; */
  border-bottom: 1px solid red;
}

.header .top {
  width: 100%;
  height: 72px;
  border-bottom: 1px solid red;
  background: linear-gradient(to right bottom, blue, pink);
}

.header .middle {
  width: 100%;
  height: 72px;
  border-bottom: 1px solid red;
  background-color: #fff;
}

.header .bottom {
  width: 100%;
  height: 72px;
  border-bottom: 1px solid red;
  background-color: #fff;
}

.main {
  display: flex;
  justify-content: center;
  gap: 20px;
  width: 100%;
  padding-top: 20px;
  /* height: 1000px; */
  /* border: 1px solid red; */
}

.main .nav {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  
  width: 105px;
  /* height: 500px; */
  /* border: 1px solid red; */
}

.nav ol {
  border-radius: 10px;
  width: 105px;
  background-color: #fff;
  border: 1px solid transparent;
  text-align: center;
  padding-left: 10px;
  box-shadow: 0 4px 8px 0 rgba(28, 31, 33, .1);
}
.nav .nav-item {
  width: 90%;
  height: 40px;
  line-height: 40px;
  cursor: pointer;
  /* border: 1px solid red; */
  margin-bottom: 10px;
}

.main .content {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  width: 1025px;
  padding-top: 10px;
  background-color: #fff;
  border-radius: 20px;
  border: 1px solid transparent;
  box-shadow: 0 4px 8px 0 rgba(28, 31, 33, .1);
}

.content .content-item {
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 100%;
  height: 80px;
  
}

.content-item .article-img {
  width: 80px;
  height: 80px;
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  /* border: 1px solid red; */
}

.content-item .article-img img {
  width: 90%;
  height: 90%;
  border-radius: 10px;
}

.article-info {
  height: 80px;
  width: 900px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid #e8e8e8;
  /* border: 1px solid red; */
}

.article-title {
  width: 100%;
  height: 40px;
  line-height: 40px;
}
.article-tag {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  height: 40px;
}

.article-tag .tag-left {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 10px;
}
